Extruded master frame window sill



FIG. 1 is an end elevational view of an extruded master frame window sill showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a bottom perspective view thereof. 

The ornamental design for an extruded master frame window sill, as shown. 